As more and more colleges and universities are shutting down their campuses over the next several weeks in an effort to curb the spread of COVID-19, education technology companies have stepped forward to help move student learning to the virtual realm. Some companies are making their paid services free through the rest of the school year; others are lifting limits to services and/or adding premium features to what's free. The following list will be updated regularly as announcements are made.
https://campustechnology.com/articles/2020/03/16/free-and-discounted-ed-tech-tools-for-online-learning-during-the-coronavirus-pandemic.aspx